Meyer Sound Laboratories has
devoted itself to designing,
manufacturing, and refining
components that deliver superb
sonic reproduction. Every part of
every component is designed and
built to exacting specifications and
undergoes rigorous, comprehen-
sive testing in the laboratories.
Research remains an integral,
driving force behind all
production. Meyer strives for
sound quality that is predictable
and neutral over an extended
lifetime and across an extended
range.
Sound
engineering
for the art
and science
of sound.
Meyer Sound Laboratories, Inc.
2832 San Pablo Avenue
Berkeley, CA 94702
(
510
) 486-1166
FAX (
510
) 486-8356
Architectural andEngineering Specifications
The compact sound reinforcement
speaker system shall be a two-way type
with a 12" low-frequency loudspeaker front-
mounted in a ducted bass-reflex hardwood
plywood enclosure with a compression
driver mounted on a high-frequency horn
which has a 1.4" throat, and a separate
Control Electronics Unit.
The Control Electronics Unit shall
contain a power supply capable of opera-
ting from a 120/240V AC, 50/60 Hz line,
electronic crossover circuitry, electronic
delay for the phase alignment of the
low-frequency speaker, low- and high-
frequency sliding filters which automati-
cally activate under high power conditions,
RMS limiters which protect the speakers
from over-heating, equalization circuitry,
active balanced input, indicator LED’s
for power on and limiters. Total harmonic
distortion shall be less than .1%. “A”-
weighted noise level shall be at least 110 dB
below maximum rated output of +26 dBu.
The speaker system, its companion
Control Electronics Unit, and a power
amplifier rated at 250 watts/channel into
8 ohms shall meet the following perfor-
mance criteria: Frequency response, 80 Hz
to 18 kHz plus or minus 4 dB measured
with
1
⁄
3
octave pink noise, 1 meter on axis;
output of 125 dB SPL measured 1 meter
on axis with peaks of 132 dB SPL driven
with “A”-weighted noise. Total harmonic
distortion shall be less than 1% at 110 dB
SPL and 3% at 120 dB SPL one meter on
axis. Distribution pattern, 80 degrees
horizontal by 60 degrees vertical.
Speaker dimensions shall be 14
1
⁄
2
" W x
22
3
⁄
8
" H x 14
1
⁄
2
" D, weight 67 lbs (30 kg).
Control Electronics Unit dimensions
shall be 19" W x 1
3
⁄
4
" H x 7
3
⁄
4
" D, weight
8␣lbs (3.6 kg).
The speaker system shall be the Meyer
Sound UPA-1C. The Control Electronics
Unit shall be the Meyer Sound M-1A.
© 1994 Meyer Sound 04052042.03 A2
UPA-1C/M-1A